SAFEARRAY * *类型比较复杂，不像其他类型可以直接传入Fire事件方法里。

先看基本类型参数处理方法： 举例LONG型

HRESULT Fire_CloseCompleted(LONG MethodID)
 {
  CComVariant varResult;
  T* pT = static_cast<T*>(this);
  int nConnectionIndex;
  CComVariant* pvars = new CComVariant[1];
  int nConnections = m_vec.GetSize();
  
  for (nConnectionIndex = 0; nConnectionIndex < nConnections; nConnectionIndex++)
  {
   pT->Lock();
   CComPtr<IUnknown> sp = m_vec.GetAt(nConnectionIndex);
   pT->Unlock();
   IDispatch* pDispatch = reinterpret_cast<IDispatch*>(sp.p);
   if (pDispatch != NULL)
   {
    VariantClear(&varResult);
    pvars[0] = MethodID;
    DISPPARAMS disp = { pvars, NULL, 1, 0 };
    pDispatch->Invoke(0x60010003, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &disp, &varResult, NULL, NULL);
   }
  }
  delete[] pvars;
  return varResult.scode;
 
 }

蓝色字体是与参数相关语句。

再看SAFEARRAY * *类型的处理方法：

 HRESULT Fire_MessageReceived(SAFEARRAY * * Message)
 {
  CComVariant varResult;
  T* pT = static_cast<T*>(this);
  int nConnectionIndex;
  CComVariant* pvars = new CComVariant[1];
  int nConnections = m_vec.GetSize();
  
  for (nConnectionIndex = 0; nConnectionIndex < nConnections; nConnectionIndex++)
  {
   pT->Lock();
   CComPtr<IUnknown> sp = m_vec.GetAt(nConnectionIndex);
   pT->Unlock();
   IDispatch* pDispatch = reinterpret_cast<IDispatch*>(sp.p);
   if (pDispatch != NULL)
   {
    VariantClear(&varResult);
    pvars[0].vt = VT_ARRAY | VT_BYREF | VT_UI1;  //参数类型
    pvars[0].pparray = Message;                                 //参数值
    DISPPARAMS disp = { pvars, NULL, 1, 0 };
    pDispatch->Invoke(0x60010008, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &disp, &varResult, NULL, NULL);
   }
  }
  delete[] pvars;
  return varResult.scode;
 
 }